package com.ruoyi.generator.util;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;

import com.ruoyi.generator.config.GenConfig;
import org.apache.velocity.VelocityContext;
import com.alibaba.fastjson.JSONObject;
import com.ruoyi.common.constant.GenConstants;
import com.ruoyi.common.utils.DateUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.generator.domain.GenTable;
import com.ruoyi.generator.domain.GenTableColumn;

/**
 * 模板处理工具类
 *
 * @author xinqilin
 */
public class VelocityUtils 
    /**
     * 项目空间路径
     */
    private static final String PROJECT_PATH = "main/java";

    /**
     * mybatis空间路径
     */
    private static final String MYBATIS_PATH = "main/resources/mapper";

    /**
     * 默认上级菜单，系统工具
     */
    private static final String DEFAULT_PARENT_MENU_ID = "3";

    /**
     * 设置模板变量信息
     *
     * @return 模板列表
     */
    public static VelocityContext prepareContext(GenTable genTable) 
        String moduleName = genTable.getModuleName(); // 模块名
        String businessName = genTable.getBusinessName(); // 业务名
        String packageName = genTable.getPackageName(); // 包名
        String configPackageName = GenConfig.getPackageName();
        String[] dirs = getDirs(configPackageName, packageName);
        String dir = dirs[0];
        packageName = configPackageName+"."+dir; //修改包名

        String subpackage = getLastAsSubpackage(dirs).trim();//获得子包名
        String modulePackage = appendSubVueJsPath(dirs);
        String tplCategory = genTable.getTplCategory(); // 生成模板的类型
        String functionName = genTable.getFunctionName(); // 方法名

        VelocityContext velocityContext = new VelocityContext();
        velocityContext.put("tplCategory", genTable.getTplCategory());
        velocityContext.put("tableName", genTable.getTableName());
        velocityContext.put("functionName", StringUtils.isNotEmpty(functionName) ? functionName : "【请填写功能名称】");
        velocityContext.put("ClassName", genTable.getClassName());
        velocityContext.put("className", StringUtils.uncapitalize(genTable.getClassName()));
        velocityContext.put("moduleName", genTable.getModuleName());
        velocityContext.put("BusinessName", StringUtils.capitalize(genTable.getBusinessName()));
        velocityContext.put("businessName", genTable.getBusinessName());
        velocityContext.put("basePackage", getPackagePrefix(packageName));
        velocityContext.put("packageName", packageName);
        velocityContext.put("author", genTable.getFunctionAuthor());
        velocityContext.put("datetime", DateUtils.getDate());
        velocityContext.put("pkColumn", genTable.getPkColumn());
        velocityContext.put("importList", getImportList(genTable.getColumns()));
        velocityContext.put("permissionPrefix", getPermissionPrefix(moduleName, businessName));
        velocityContext.put("columns", genTable.getColumns());
        velocityContext.put("table", genTable);
        velocityContext.put("subpackage", subpackage);
        velocityContext.put("modulePackage", modulePackage);
        setMenuVelocityContext(velocityContext, genTable);
        if (GenConstants.TPL_TREE.equals(tplCategory)) 
            setTreeVelocityContext(velocityContext, genTable);
        
        return velocityContext;
    

    public static void setMenuVelocityContext(VelocityContext context, GenTable genTable) 
        String options = genTable.getOptions();
        JSONObject paramsObj = JSONObject.parseObject(options);
        String parentMenuId = getParentMenuId(paramsObj);
        context.put("parentMenuId", parentMenuId);
    

    public static void setTreeVelocityContext(VelocityContext context, GenTable genTable) 
        String options = genTable.getOptions();
        JSONObject paramsObj = JSONObject.parseObject(options);
        String treeCode = getTreecode(paramsObj);
        String treeParentCode = getTreeParentCode(paramsObj);
        String treeName = getTreeName(paramsObj);

        context.put("treeCode", treeCode);
        context.put("treeParentCode", treeParentCode);
        context.put("treeName", treeName);
        context.put("expandColumn", getExpandColumn(genTable));
        if (paramsObj.containsKey(GenConstants.TREE_PARENT_CODE)) 
            context.put("tree_parent_code", paramsObj.getString(GenConstants.TREE_PARENT_CODE));
        
        if (paramsObj.containsKey(GenConstants.TREE_NAME)) 
            context.put("tree_name", paramsObj.getString(GenConstants.TREE_NAME));
        
    

    /**
     * 获取模板信息
     *
     * @return 模板列表
     */
    public static List<String> getTemplateList(String tplCategory) 
        List<String> templates = new ArrayList<String>();
        templates.add("vm/java/domain.java.vm");
        templates.add("vm/java/mapper.java.vm");
        templates.add("vm/java/service.java.vm");
        templates.add("vm/java/serviceImpl.java.vm");
        templates.add("vm/java/controller.java.vm");
        templates.add("vm/xml/mapper.xml.vm");
        templates.add("vm/sql/sql.vm");
        templates.add("vm/js/api.js.vm");
        if (GenConstants.TPL_CRUD.equals(tplCategory)) 
            templates.add("vm/vue/index.vue.vm");
         else if (GenConstants.TPL_TREE.equals(tplCategory)) 
            templates.add("vm/vue/index-tree.vue.vm");
        
        return templates;
    

    /**
     * 获取文件名
     */
    public static String getFileName(String template, GenTable genTable) 
        // 文件名称
        String fileName = "";
        // 包路径 com.ruoyi.waidaipc系统名 下一级是 系统的的模块名 剩下的除去最后一级 都是子包
        String packageName = genTable.getPackageName(); //代码生成表中保存的 包名

        String packageNameConfig = GenConfig.getPackageName();//系统名

        // 模块名
        String moduleName = genTable.getModuleName();
        // 大写类名
        String className = genTable.getClassName();
        // 业务名称
        String businessName = genTable.getBusinessName();

        String[] dirs = getDirs(packageNameConfig, packageName);
        String moduleDir = dirs[0];//项目模块包
        String[] subDirs = Arrays.copyOfRange(dirs,1,dirs.length);//动态 拼子包

        String javaPath = PROJECT_PATH + "/" + StringUtils.replace(packageNameConfig, ".", "/")+"/"+moduleDir;
        String mybatisPath = MYBATIS_PATH;
        String vuePath = "vue";


        if (template.contains("domain.java.vm")) 
            fileName = appendPath(javaPath, "/domain", subDirs, "/" + className + ".java");
         else if (template.contains("mapper.java.vm")) 
            fileName = appendPath(javaPath, "/mapper", subDirs, "/" + className + "Mapper.java");
         else if (template.contains("service.java.vm")) 
            fileName = appendPath(javaPath, "/service", subDirs, "/I" + className + "Service.java");
         else if (template.contains("serviceImpl.java.vm")) 
            fileName = appendPath(javaPath, "/service/impl", subDirs, "/" + className + "ServiceImpl.java");
         else if (template.contains("controller.java.vm")) 
            fileName = appendPath(javaPath, "/controller", subDirs, "/" + className + "Controller.java");
         else if (template.contains("mapper.xml.vm")) 
            fileName = appendPath(mybatisPath, "", dirs , "/" + className + "Mapper.xml");//全部路径少最后一级
         else if (template.contains("sql.vm")) 
            fileName = appendPath("", "", null, businessName + "Menu.sql");//无需目录
         else if (template.contains("api.js.vm")) 
            fileName = appendPath(vuePath, "/api", dirs, "/" + businessName + ".js");//全部路径少最后一级
         else if (template.contains("index.vue.vm")) 
            fileName = appendPath(vuePath, "/views", dirs,  "/"+businessName+"/index.vue");//需要全部路径
         else if (template.contains("index-tree.vue.vm")) 
            fileName = appendPath(vuePath, "/views", dirs,  "/"+businessName+"/index.vue");//需要全部路径
        
        return fileName;
    

    /**
     * 获取包前缀
     *
     * @param packageName 包名称
     * @return 包前缀名称
     */
    public static String getPackagePrefix(String packageName) 
        int lastIndex = packageName.lastIndexOf(".");
        String basePackage = StringUtils.substring(packageName, 0, lastIndex);
        return basePackage;
    

    /**
     * 根据列类型获取导入包
     *
     * @param columns 列集合
     * @return 返回需要导入的包列表
     */
    public static HashSet<String> getImportList(List<GenTableColumn> columns) 
        HashSet<String> importList = new HashSet<String>();
        for (GenTableColumn column : columns) 
            if (!column.isSuperColumn() && GenConstants.TYPE_DATE.equals(column.getJavaType())) 
                importList.add("java.util.Date");
                importList.add("com.fasterxml.jackson.annotation.JsonFormat");
             else if (!column.isSuperColumn() && GenConstants.TYPE_BIGDECIMAL.equals(column.getJavaType())) 
                importList.add("java.math.BigDecimal");
            
        
        return importList;
    

    /**
     * 获取权限前缀
     *
     * @param moduleName   模块名称
     * @param businessName 业务名称
     * @return 返回权限前缀
     */
    public static String getPermissionPrefix(String moduleName, String businessName) 
        return StringUtils.format(":", moduleName, businessName);
    

    /**
     * 获取上级菜单ID字段
     *
     * @param paramsObj 生成其他选项
     * @return 上级菜单ID字段
     */
    public static String getParentMenuId(JSONObject paramsObj) 
        if (StringUtils.isNotEmpty(paramsObj) && paramsObj.containsKey(GenConstants.PARENT_MENU_ID)) 
            return paramsObj.getString(GenConstants.PARENT_MENU_ID);
        
        return DEFAULT_PARENT_MENU_ID;
    

    /**
     * 获取树编码
     *
     * @param paramsObj 生成其他选项
     * @return 树编码
     */
    public static String getTreecode(JSONObject paramsObj) 
        if (paramsObj.containsKey(GenConstants.TREE_CODE)) 
            return StringUtils.toCamelCase(paramsObj.getString(GenConstants.TREE_CODE));
        
        return StringUtils.EMPTY;
    

    /**
     * 获取树父编码
     *
     * @param paramsObj 生成其他选项
     * @return 树父编码
     */
    public static String getTreeParentCode(JSONObject paramsObj) 
        if (paramsObj.containsKey(GenConstants.TREE_PARENT_CODE)) 
            return StringUtils.toCamelCase(paramsObj.getString(GenConstants.TREE_PARENT_CODE));
        
        return StringUtils.EMPTY;
    

    /**
     * 获取树名称
     *
     * @param paramsObj 生成其他选项
     * @return 树名称
     */
    public static String getTreeName(JSONObject paramsObj) 
        if (paramsObj.containsKey(GenConstants.TREE_NAME)) 
            return StringUtils.toCamelCase(paramsObj.getString(GenConstants.TREE_NAME));
        
        return StringUtils.EMPTY;
    

    /**
     * 获取需要在哪一列上面显示展开按钮
     *
     * @param genTable 业务表对象
     * @return 展开按钮列序号
     */
    public static int getExpandColumn(GenTable genTable) 
        String options = genTable.getOptions();
        JSONObject paramsObj = JSONObject.parseObject(options);
        String treeName = paramsObj.getString(GenConstants.TREE_NAME);
        int num = 0;
        for (GenTableColumn column : genTable.getColumns()) 
            if (column.isList()) 
                num++;
                String columnName = column.getColumnName();
                if (columnName.equals(treeName)) 
                    break;
                
            
        
        return num;
    

    /**
     * 表单中设置的包路径的最后一级 作为Controller, Service, Mapper 子包名
     *
     * @param dirs 表单中设置的包路径
     * @return
     */
    public static String getLastAsSubpackage(String dirs []) 
        StringBuilder sb = new StringBuilder();
        if (dirs!=null && dirs.length!=0)
            for (int i = 1; i < dirs.length; i++) 
                sb.append(".").append(dirs[i]);
            
        
        return sb.toString();
    


    public static String[] getDirs(String configPackage, String dbPackage) 
        String[] split1 = configPackage.split("\\\\.");
        String[] split2 = dbPackage.split("\\\\.");
        String[] strings = Arrays.copyOfRange(split2, split1.length, split2.length);
        return strings;
    

    public static String appendPath(String prefix, String fix, String[] elongate, String suffix) 
        StringBuilder sb = new StringBuilder();
        sb.append(prefix).append(fix);
        if ( elongate != null && elongate .length !=0) 
            for (String s : elongate) 
                sb.append("/").append(s);
            
        
        sb.append(suffix);
        return sb.toString();
    

    /**
     *  生成 vue 导入js的多级目录
     * @param dirs
     * @return
     */
    public static String appendSubVueJsPath(String [] dirs)
        StringBuilder sb = new StringBuilder();
        if(dirs!=null&&dirs.length!=0)
            for (int i = 0; i < dirs.length-1; i++) 
                sb.append("/").append(dirs[i]);
            
        
        return sb.toString();